Unnamed (at headwaters of Burro Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SK
Quadrangle map, 1:63,360-scale B-2
Latitude 59.48
Longitude -135.47
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 3,500 feet about 1.4 miles west of Parsons Peak in a saddle at the head of Burro Creek. It is in the south-central part of section 36, T. 27 S., R. 58 E. of the Copper River Meridian. It is shown as mineral occurrence 8 by Redman and others (1984) and as number S066 by Wells and others (1986).

Geologic setting

Geologic description

According to Redman and others (1984), this occurrence consists of quartz vein float from the Burro Creek fault zone where it cuts biotite quartz monzonite of the Ferebee pluton at the head of Burro Creek. The quartz-vein float contains pyrite and chalcopyrite A sample contained 1,580 ppm copper, 50.5 ppm silver, 170 ppm lead, and 128 ppm molybdenum. The veins were found only as float along the fault trace. The mineralization must be younger than the Late Cretaceous to early Paleocene Ferebee pluton (Redman and others, 1984).
Geologic map unit (-135.471828052751, 59.4796737651156)
Mineral deposit model Quartz-sulfide vein (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 22c?
Age of mineralization Younger than Late Cretaceous based on the age of intrusive rocks cut by the Burro Creek fault (Redman and others, 1984).

Production and reserves

Indication of production None

References